Here is a breakdown chart of the An Hose and fittings size chart. shows -AN3 -AN4, -AN6, -AN8, -AN10, -AN12 AND AN16  See More -AN Fittings Click Here 

Here Is A Chart That Shows All of the Pipe thread Sizes and Threads Per inch Tpi: NPT Fittings (Click Here)Pipe Thread Size:Threads Per Inch:Theoretical I.D. Closest AN Size:1/16271/16-1/8271/841/4181/463/8183/8 81/2141/2103/4143/412111-1/21161-1/411-1/21-1/4201-1/211-1/21-1/224211-1/2232 … read more

The fuel tank rollover safety valve is a brass or plastic valve located on the fuel tank.  The fuel tank rollover check valve works by way of a ball or spring inside that allows pressure and vapor to escape the fuel tank when changes in temperature occurs. The Ball in the valve moves to the closed position when the vehicle experiences a rollover; in effect cutting off fuel from exiting the tank. Most fuel tanks have a rollover valve of some kind. This article is regarding threaded brass rol … read more

A fuel sending unit measures the fuel in the gas tank by measuring ohm resistance by way of a rheostat connected to a float and lever. This is connected to a gauge located on the tank or in the cabin of the vehicle.When purchasing a fuel sending unit you must match it up to the gauges in the vehicle or aftermarket company specs. The Ohm rating is the resistance rating used to identify what gauge goes with which fuel level sensor. Below is a list of applications for gauge and sender compatibility … read more

A radiator filler neck is a cap opening that is installed in between the upper radiator hose fitting and the fitting on the engine. It allows  you to fill up the cooling system with coolant by removing the cap. It usually has a pressure cap and is secured with hose clamps.You have finally finished that sweet engine swap, everything is assembled and you are now in the testing and tuning phase. You now have one last problem to diagnose - OVERHEATING!.You have the big aluminum radiator, the g … read more